Three identical towels of red, blue and green colour are hanging on a clothes line in the sun. What would be the colour of shadows of these towels?
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1. the number of ways in the squares of 8x8 chess board can be painted red or blue so that each 2x2 square has two red and two blue squares is
Solution: For an m×n chessboard there are 2m+2n−2 ways. Case I. There are two horizontally adjacent squares of the same color: 2m−2 ways. Case II. There are two vertically adjacent squares of the same color: 2n−2 ways. Case III. None of the...
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One die of red colour, one of white colour and one of blue colour are placed in a bag.
A die has six faces that are numbered from 1 to 6, with one number on each face. Let us denote the red, white, and blue dices as R, W,...
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Given 5 different green dyes ,four different blue dyes and three different red dyes,the number of combinations of dyes which can be chosen
Green dyes =5 Blue dyes =4 Red dyes =3 The no of ways of choosing of at least one green and one blue is =(25−1)×(24−1)×23 ⇒(32−1)×(16−1)×8 ⇒31×15×8 ⇒3720
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From 5 different green balls, four different blue balls and three different red balls, how many combinations of balls can be chosen
Total combination of balls = 212 Combination of balls with no green balls = 27 Combination of balls with no blue balls = 28 Combination of balls with no blue balls and no green...
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A flat in Mumbai with a balcony facing the sea has some clothes hung on a clothes line in the balcony.
The clothes will be blown towards the house due to sea breeze blowing towards the land.
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Why do wet clothes placed on a clothes line get dry after some time? Explain.
Water present in wet clothes is converted into water vapour due to evaporation and leaves them dry.
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One die of red colour, one of white colour and one of blue colour are placed in a bag
A die has six faces that are numbered from 1 to 6, with one number on each face. Let us denote the red, white, and blue dices as R, W,...
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Critical angle of light passing from glass to water is minimum for (a) red colour (b) green colour
(d) violet colour
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In a box there are 8 red, 7 blue and 6 green balls. One ball is picked up randomly. What is the probability that it is neither red nor green?
(e) If the drawn ball is neither red nor green, then it must be blue, which can be picked in 7C1 = 7 ways. One ball can be picked from...
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There are some balls of red, green and yellow colour lying on a table. There are as many red balls as there are yellow balls.
(b) According to question R = y and y = 2G ∴ R = 2G Hence, the number of red balls is double the number of green balls.
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